...which is no wonder, since LG.Display holds the patent for IPS tech.
AUO and CMO make a few IPS display models, under license from LG, and Samsung makes the very similar PLS panels (still plane-based crystal rotation, slightly different electric field application method).

...which is no wonder, since LG.Display holds the patent for IPS tech.

Click to expand...

Not exactly

LG stumbled along trying to make better LCD panels, until they partnered with Philips to develop IPS panels and together they co-hold many patents as "Lg.Philips Lcd Co., Ltd.".

LG has since broken off the relationship (about the beginning of 2008) to mass produce IPS panels of a lower quality than Philips was interested in making and holds many of it's own patents.
That is not to say that LG made panels are not excellent as a mass production panel, they are just not of the same quality as the limited production LG-Philips panels were.
As far as I know Philips no longer produces or engineers panels with any partners.

The LG-Philips panels, as used in the NEC LCD2490WUXi, LCD2690WUXi and LCD3090WQXi, were the peak of their collaboration (H-IPS) and also their last high quality panel (per Philips).
The almost same panels were used in some Apple products during this time period (2005-2006), however Apple was limited, by NEC's contract with LG-Philips, to the panels NEC didn't want (basically those rejected), yet Apple passed them off successfully as 1st quality, as they were so superior to what existed in the marketplace.

NEC took these extremely high quality panels and built the above named monitors around them as top of the industry color reference monitors for photography and video.
These older NEC monitors still look better and are superior to almost all of the newer IPS monitors, and in most cases still sell for as much, or more than, current models, even though they are 7-8 years old
That's the mark of a quality product.

Really makes me wish the LG-Philips collaboration had worked out better, we'd probably have 8K panels with a .2ms G2G time by now